body
{
    margin:0;
}

#header
{
    
    padding-right: 0;
    width: 100%;

}

#header1 
{
    background-color:rgb(224,233,232);
    color:white;
    text-align:center;
    padding:5px;
    height: 60px;
    position:absolute;
    top: 0;
    
   
}

#ylglogo
{
    width: 16%;
    float: left;
    padding-right: 40px;
    
}

#daohanglan
{
    float: right;
    position: relative;
    left: -30px;
    top: -34px;
}

.daohang
{
    list-style-type:none;
    margin:0;
    padding:30px;
    height: 100px;

}
.li
{
    float:left;
    text-align: center;

}
.a:link,.a:visited
{
    height: 30px;
    display:block;
    width:120px;
    font-weight:bold;
    color:black;
    background-color:rgb(211.220,227);
    text-align:center;
    padding:20px;
    text-decoration:none;
    text-transform:uppercase;
}
.a:hover,.a:active
{
    background-color:rgb(211.220,227);
}
.dropdown
{
    display:inline-block;
}
  
.dropdown-content
{
    display:none;
    position:absolute;
    background-color:#f9f9f9;
    min-width:160px;
    box-shadow:5px -8px 16px 0px rgba(0,0,0,0.2);
}
  
.dropdown-content a
{
    color:black;
    padding:12px 30px;
    text-decoration:none;
    display:block;
    background-color: rgb(184,195,207);
}
  
.dropdown-content a:hover {background-color: rgb(159,163,168);}
  
.dropdown:hover .dropdown-content
{
    display:block;
}
